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April 01, 2013

The International Energy Conservation Codes (IECC 2009 and 2012) require HVAC ducts to be tested to prove a minimum leakage of a rather easily obtained 12 CFM/100 square feet of conditioned floor area. While many states and localities ... [continue reading]

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February 25, 2013

After I described how air can get sucked down the chimney and vent connector and flue, and out the draft diverter of the gas water heater, and into the basement, the mother, who was now ... [continue reading]

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February 25, 2013

As any BPI Building Analyst will tell you, it’s hard to become adept at combustion testing. It takes lots of practice, in real houses, with real mechanical equipment. No amount of classroom training ... [continue reading]

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August 28, 2012

The green building community is sold on the value of certifications. For the worker, professional credentials demonstrate a degree of knowledge and skill. They help employers screen applicants and help energy efficiency program administrators set ... [continue reading]